| 6 Stars Consultancy Limited | Professional & scientific | 2021 |
| 69 Square Limited | Construction | 2005 |
| 6S Global Ltd | Information & communication | 2012 |
| 7 Southfields Freehold Limited | Households | 2015 |
| 7 Star Living Limited | Wholesale & retail | 2024 |
| 73 Oval Road Management Company Limited | Households | 2015 |
| 74 Darnley Road RTM Company Limited | Households | 2018 |
| 8 Waters Consultants Ltd | Professional & scientific | 2019 |
| 8PI Ltd | Real estate | 2017 |
| 8POINT3LED Limited | Manufacturing | 2017 |
| 95 Anerley Road Residents Ltd | Professional & scientific | 2006 |
| A & E Glaziers Ltd | Construction | 2023 |
| A & E Glazing Ltd | Construction | 2021 |
| A & H Kent Ltd | Wholesale & retail | 2015 |
| A & I FOY Limited | Other services | 2014 |
| A & J Prestige Ltd | Transport & logistics | 2017 |
| A 2 B Recovery Specialists Ltd | Water & waste | 2025 |
| A a Drains Ltd | Construction | 2021 |
| A a Global Enterprise Limited | Energy | 2020 |
| A Business Consulting Ltd | Water & waste | 2023 |
| A Dream IT Solutions Ltd | Information & communication | 2019 |
| A Future Investments (Kent) Limited | Construction | 2018 |
| A H Services (S E) Limited | Real estate | 2026 |
| A Imam Ltd | Health & social care | 2021 |
| A J Carpentry & Roofing Limited | Construction | 2014 |
| A Kopa Construction Limited | Construction | 2016 |
| A Main Event Ltd | Administrative & support | 2022 |
| A New Nation Entertainment Limited | Information & communication | 2025 |
| A Plus Security & Electrical Ltd | Administrative & support | 2016 |
| A R Hotels Ltd. | Hospitality | 2010 |
| A Riley Consultancy Ltd | Real estate | 2026 |
| A S North Limited | Construction | 1979 |
| A Special Design Support Services C.I.C. | Health & social care | 2022 |
| A Thin Line Between Ltd | Professional & scientific | 2022 |
| A V S Engineering & Maintenance Limited | Professional & scientific | 2013 |
| A W S Financial Services Limited | Financial services | 2015 |
| A&A Property Holdings Ltd | Real estate | 2020 |
| A&E Build Ltd | Real estate | 2023 |
| A&J Family Ltd | Wholesale & retail | 2025 |
| A&L Lifts Ltd | Construction | 2020 |
| A&M Concern Ltd | Administrative & support | 2019 |
| A&M Pensions Ltd | Extraterritorial | 2012 |
| A&M Seller Limited | Wholesale & retail | 2023 |
| A&P Saunders Properties Limited | Real estate | 2016 |
| A&S Properties Management Ltd | Real estate | 2018 |
| A&Y Management Ltd | Professional & scientific | 2019 |
| A-2-B Rubbish Clearance Ltd | Water & waste | 2024 |
| A-Demand Electrical Solutions Ltd. | Construction | 2024 |
| A.B. Sports Marketing Ltd | Wholesale & retail | 2024 |
| A.B.P. Group Limited | Real estate | 2020 |
| A.B.T. Design Limited | Manufacturing | 1986 |
| A.C. Egerton (Holdings) Limited | Professional & scientific | 1964 |
| A.C.E (Primary Consultancy) Limited | Education | 2022 |
| A.C.S.B Carpentry Limited | Construction | 2026 |
| A.G. Thames 2019 Limited | Financial services | 2019 |
| A.M. Delivery Services Limited | Transport & logistics | 2015 |
| A.V.A Decorators Ltd | Construction | 2012 |
| A.W. Drilling Services Ltd. | Construction | 1999 |
| A1 Fitted Kitchens Limited | Manufacturing | 2008 |
| A1 Global Construction Ltd | Water & waste | 2025 |
| A10D Ltd | Construction | 2022 |
| A2 Cars Dartford Limited | Transport & logistics | 2010 |
| A4 Reddys Ltd | Real estate | 2023 |
| A60 Technologies Limited | Information & communication | 2024 |
| A7 Properties Limited | Real estate | 2019 |
| A@D Facility Services Ltd | Administrative & support | 2026 |
| AA Farms Limited | Real estate | 2020 |
| AA Konsult Ltd | Construction | 2024 |
| AA Management Ltd | Professional & scientific | 2020 |
| AAA Bryant Homes Ltd | Real estate | 2025 |
| AAA Contractors Ltd | Construction | 2015 |
| AAA Contractors Solutions Ltd | Construction | 2026 |
| AAD Datainfrastructure Ltd | Construction | 2021 |
| Aahkia & Associates Limited | Professional & scientific | 2022 |
| Aalam-E-Barzakh Ltd | Other services | 2023 |
| Aalogika Ltd | Information & communication | 2018 |
| Aalter Ltd | Information & communication | 2022 |
| Aalter Modular Ltd | Information & communication | 2023 |
| Aamira Spice House Ltd | Hospitality | 2024 |
| Aaml Group Ltd | Information & communication | 2021 |
| AAO Creative Ltd | Information & communication | 2022 |
| Aara Engineering Private Ltd | Construction | 2019 |
| Aaradhya Limited | Wholesale & retail | 2021 |
| Aarbon Management & Construction Ltd | Construction | 2023 |
| Aardvark Taxation Services Limited | Professional & scientific | 1996 |
| Aarwin Ltd | Health & social care | 2022 |
| Aasfor Limited | Professional & scientific | 2015 |
| Aasg & Co Limited | Professional & scientific | 2024 |
| Aashiyanah Ltd | Real estate | 2024 |
| Aathu & Aathithi Property Ltd | Real estate | 2023 |
| Aathy Properties Limited | Real estate | 2024 |
| AAZ Health Ltd | Health & social care | 2012 |
| AB Group London Ltd | Wholesale & retail | 2026 |
| AB Key LLP | | 2013 |
| AB Soccer Services Ltd. | Administrative & support | 2010 |
| ABA Building Contractors Ltd | Construction | 2015 |
| Abac Holdings Limited | Real estate | 1987 |
| Abacus Blue Limited | Professional & scientific | 2012 |
| Abacus Lawrence Group Limited | Professional & scientific | 2007 |
| Abacus Playgrounds Limited | Construction | 1994 |